---
title: "expandItem(_:)"
framework: appkit
role: symbol
role_heading: Instance Method
path: "appkit/nsoutlineview/expanditem(_:)"
---

# expandItem(_:)

Expands a given item.

## Declaration

```swift
func expandItem(_ item: Any?)
```

## Parameters

- `item`: An item in the receiver.

## Discussion

Discussion If item is not expandable or is already expanded, does nothing. If expanding takes place, posts an item expanded notification.

## See Also

### Expanding and Collapsing the Outline

- [expandItem(_:expandChildren:)](appkit/nsoutlineview/expanditem(_:expandchildren:).md)
- [collapseItem(_:)](appkit/nsoutlineview/collapseitem(_:).md)
- [collapseItem(_:collapseChildren:)](appkit/nsoutlineview/collapseitem(_:collapsechildren:).md)